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A method for co-processing lead glass and waste catalyst

A waste catalyst and co-processing technology, applied in the direction of improving process efficiency, etc., can solve the problem of high energy consumption in smelting, achieve obvious environmental and economic benefits, improve capture efficiency, and achieve high capture efficiency

Active Publication Date: 2022-08-02
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent document with the application number 201810185054.8 discloses "a method for recovering precious metal platinum from automobile waste catalysts by pyrolysis", which uses iron-containing oxides as collectors and conducts the process at a high temperature of 1600-2000°C in a DC electric arc furnace. For smelting, the upper slag liquid is naturally cooled at room temperature to form a glass state or is quenched to form glass beads. The smelting energy consumption is high, and the slag is not effectively recovered.

Method used

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  • A method for co-processing lead glass and waste catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] use figure 1 The shown method for co-processing of lead glass and spent catalyst, which treats spent catalyst and lead glass, includes the following steps:

[0033] Crush the lead glass and waste catalyst to 0.074-0.178mm, take 200g of waste catalyst, add 200g of lead glass, 60g of calcium oxide, 4g of anthracite, and add 5g of cellulose as a binder, mix evenly in the mixing tank, and use powder The tablet press compresses the mixture into The cylindrical sample was loaded into a graphite crucible.

[0034] The material was smelted in an intermediate frequency induction furnace, the sample was heated to 1400°C, and argon gas was sprayed above the melt at a flow rate of 0.5 L·min. -1. After smelting for 2 hours, pour the upper glass liquid into water and dry to obtain 335g of basic glass particles. The metal melt at the bottom of the crucible and the crucible are placed in the air to cool, and 35.4g of lead alloy is obtained after separating the slag phase.

[0035]...

Embodiment 2

[0038] use figure 1 The shown co-processing method from lead glass and spent catalyst, which treats spent catalyst and lead glass, includes the following steps:

[0039] Crush the lead glass and waste catalyst to 0.074-0.178mm, take 200g of waste catalyst, add 300g of lead glass, 100g of calcium oxide, 7.5g of anthracite, and 8g of cellulose, mix them evenly in the mixing tank, and use a powder tablet machine to make the mixture evenly. pressed The cylindrical sample was loaded into a graphite crucible.

[0040] The material is smelted in an intermediate frequency induction furnace, the sample is heated to 1500°C, and argon gas is sprayed above the melt, and the argon gas flow rate is 0.4L·min -1 . After smelting for 4 hours, pour the upper glass liquid into water, and dry to obtain 432g of basic glass particles. The metal melt at the bottom of the crucible and the crucible are placed in the air to cool, and 52.7g of lead alloy is obtained after separating the slag phase. ...

Embodiment 3

[0044] use figure 1 The shown co-processing method from lead glass and spent catalyst, which treats spent catalyst and lead glass, includes the following steps:

[0045] Crush the lead glass and waste catalyst to 0.074-0.178mm, take 200g of waste catalyst, add 250g of lead glass, 130g of calcium oxide, 5g of anthracite, and 6g of cellulose, mix them evenly in a mixing tank, and press the mixture with a powder tablet machine. to make The cylindrical sample was loaded into a graphite crucible.

[0046] The material was smelted in an intermediate frequency induction furnace, the sample was heated to 1300°C, and argon gas was sprayed above the melt at a flow rate of 0.8 L·min. -1 . After smelting for 3 hours, pour the upper glass liquid into water and dry to obtain 426g of basic glass particles. The metal melt at the bottom of the crucible and the crucible are placed in the air to cool, and 44.7g of lead alloy is obtained after separating the slag phase.

[0047] The base gla...

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Abstract

The invention belongs to the technical field of solid waste treatment, and specifically discloses a method for co-processing lead glass and waste catalyst. The recovery method mixes lead glass, waste catalyst, calcium oxide and reducing agent, smelts at 1300-1500°C, sprays argon gas at the top of the melt to enhance metal trapping, and pours the upper glass melt into water after the smelting is completed , forming basic glass particles, the basic glass is sintered to obtain glass-ceramics, Pt, Pd, Rh and other metals are enriched in the crude lead, and the precious metals can be separated by subsequent oxidation and smelting. The co-processing method of lead glass and waste catalyst provided by the invention can efficiently extract precious metals in waste automobile catalysts, and at the same time utilize the characteristics of lead glass and waste catalyst to prepare high value-added glass-ceramic products, and solve the problem of lead glass at the same time. Pollution problems, environmental and economic benefits are obvious.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for co-processing lead glass and waste catalyst. Background technique [0002] The main function of the automobile exhaust catalyst is to convert the CO and CH in the automobile exhaust x and NO x Converted to non-toxic CO 2 , H 2 O and N 2 . At present, the most widely used catalyst in automobiles is a catalyst based on cordierite, and platinum group metal particles are coated on the surface of the carrier. During the long-term use of catalysts, platinum group metals lose their catalytic activity due to contamination and encapsulation by impurities, and become ineffective catalysts. my country produces a large amount of waste auto catalysts every year, which is an important secondary resource of platinum group metals. At present, the methods for recovering platinum group metals from waste auto catalysts mainly include pyrometallurgy, wet method and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/02C22B13/02C22B7/00C03C10/00C03C6/02
CPCC22B11/025C22B11/028C22B13/025C22B7/001C03C10/0063C03C10/0036C03C1/00C03C1/002Y02P10/20
Inventor 吕建芳马致远吕先谨刘勇周吉奎刘牡丹陈志强刘超
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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